Heating apparatus



@ E35 A E, MUNKEL 1,877,421

HEAT NG APPARATUS Filed April 22. 1930 4 Sheets-Sheet l INVENTOR ATTO RNEY-a sept. 13, 1932. A, E MUNKEL 1,877,421

' HEATING APPARATUS Filed April 22, v195o 4 sheets-sheet 2 Sept. 13,1932. A. E. MUNKEL HEATING APPARATUS Filed April 22, 195C 4 Sheets-Sheet3 mvENToR T7/K M ATTORNEY:

'Sept 13, 1932. A. E, MUNKEL LSF/7,421

HEAT ING APPARATUS Filed April 22, 1930 4 Sheets-Sheet 4 INVENTORatent'ecl Septf 1x3', 1932 UNITED AnoLrH n. VMUNKEL, ononnmnnsuomoHumanay APPARATUS, i 1

Appneation'iuea A prn 22,

This invention relates to heating apparatus and is particularlydirectedto a gas attachment or hea-ter'adapted to be used in lcombination witha. coal burning furnace; y This gas heater has applicationto apreviouslyiny l y u AAVstructlon of the gas heater and to thearrangestalled coal burningfurnaceor can bersold and installed incombination with lthe 4coal furnace.

Heretofore when lthe gas heater was ,being used, the coal furnace wasentirely unheated and constituted a dead heat radiatingy area. Itistherefore an'object i of this inventlon to provide a heating 'apparatusincludinga gas heater in which not onlyV is' an extremely great heat4radiatingarea 'provided in the gas heater but which gas heater also bymeans of'conne'ctions between the respective combustionchambers makesuse of theentire 'radiating surface of 'the coal burningfurnace.

By this arrangement it is provided that the heat which ordinarily'passesout through the fume vent of the gas heater and is wasted, is directedthrough the combustion chamberof the" coal burning furnace and thenceoutthrough the'smokepipe of theaforesaid furnace. Due to the length 0ftravel of theheat and the lconsequent increased contact 'with heatradiating surfaces, theA Vpresent appa- Y Y ratus achieves the greatestpossible efciency.

It is another obj ect of this invention to provide a gas heater for usein combinationl with a coal burning furnace which is extremely.

easy to install and requires very `little alteration of the coal furnaceto which, it is applied.

It is another obj ect of this invention to' provide an adjustable baffleor plate for directing the return fresh air coming in"through the coldair duct either through" thegas heater or for deflecting it away fromthe gas attachment into the region of the coal burning furnace. Thisbaffle, therefore, functions to prevent the passage of coldl airthroughthe.' gas attachment froml whence Yit mightproceed to the rooms ofjthefhouse .in unheatedcondition. f

iea, a serial'V N. 446,229.Y

vAnother'v object of this" invention isv to .provide a` gas heater whichin 'itselfghas an' surface. u 1 Other objects relate to` the generalconextremely great 'area vof heat ``radiating nientofthe gas burnerrelative to the heating surfaces aswell as theconn'ection of theconnecting conduits or flues extending from the gas heater tothe coalburning furnace where by these nues are quickly attached tothe coalburning furnace.

Further lobjects certain advantages will Vbe more fullyapparent'fromfrthek description'of the accompanying drawings, in

which Figure l is arpe'rsp'ective view loking'to'- ward 'the Vforwardcorner loffthe combined gas heater and coal furnace landillu'strating uthe casing which'surrounds this apparatus dot and dash lines.

Figure 2 is a perspective view ofthe heati ing apparatus showing it inrelation to a coal 3-e3, f Figure 1 `detailing" the interiorI of the gasYheater'and `showingthe connection vef its lcombustion chamber with thecombustion chamber of the'coal furnace. f v` `'Figure 4 is a sectionalview ktaken online 1;4, Figure 3, further detailing the interior ofthegas'heater. t Y

Figure 5 is a top plan'lvie'w of a' lmodified `:combination ofgasattachments and coal furnaceillustratlng two gas-furnace heaters ar'- lranged, one at each side of the coal furnace.`

' Figure 6 is a lperspective view of one of the gas attachments used inthe Vdouble arrange- Yment'shown in Figure 5.1" s f' The gas burningheater unit orattachment y "10,\as,applied toa standard coal furnacev'1l is shown in Figuresl toll:A inclusive, of'; the

drawings.V This conventional c oal furnace,

Y comprises, a base plate 12, an ash pitcasing Av16, these elementsbeingmounted one upon chamber.

the other inthe order described.l A front plate 17, is bolted to thesnout 18 of the ash pit casing 13 andthe feed snout 19 of the combustioncasing chamber 15, this plate having mounted thereon the respectivedoors 20, 21, for the ash pit and the combustion The shape of this typeof'furnace is generally 'circular and the Ybase vplate 12inclu`des acircular flange 23`mounting the lower end of the circular Vcasing 24enclosing the'afore-f said furnace elements;` .This casingl24 is t nace.The respective casings 24 and 26 are formed of sheet metal Yandsurrounds the heating elements being attached'i'toxthe-re-J- spectivesides of the front plate. A flue or smoke discharge snout 25 extendsfrom-the rear of the radiator. s Y

' The gas burning heater unitiisT mounted at Ythe' rear of the` coalburning furnace after thelcasing'thereof has been removed (in thoseinstances ofsinstallation where the cfoalfurnace hasbeenpreviouslyinstalled). A :casd Ying 26r isf'provided withl thegasvheater for' connection to the cut-awaycoalfurnace CLIS- it is thereforeavery simple operation l toreconstruetthe casing'toproperly surround28-f28. The inner 'wall'27a of the gasbnrner thecombinedE gas burningheater, and the coal casing has a horizontally-arcuate portion to y'thecircular. fire AboWl and'. combustion 'chamber-of the furnace, this@nabliaglthe installation. of the gas burnerA relatively close tothecoal furnace and therebyfnecessitating very little additional space at-thejrear of the furnace.

n cabinet structure, as described is on four legs 29, onel at eachcorner of its rectangular lower. plate. The upper and lower'platesinclude grooves 31- around.

their margins and the upper and lower edges grooves 31.

Radiator tubes are disposed: .within the i heater. casingbetween the4upperA and lower pilates, theser tubes nesting over .circular fianges 34formed in the respective plates, whichfianges are marginally disposedaround openings; 35 inthe respective plates. The

Y I entire structure-is held together by, means of draw bolts ortier'ods 36 extendingthrough the. openings in the upper and lowerV plates.The rods are headedl at their upper ends and their lowerends arescrew-threaded'. The

of thel Aside 1 plates vare disposed-V in thel correct drawing tensionbetween the lugs is applied bymeans of nuts 82, one on the lower screwYthreaded end of each rod. This unit is set up directly behind thefurnace and has 'forward legs disposed on the inside of the connected attheir abutting edges by means ofra series of clips 26L on each margin ofeach casing. vAdjoining clips are drawn together this edssrf tigecesissv 1 ,Af 'glSfrrblllnr 40 is mounted within the by means of. draw boltsto snugly abut fallblistori chamber 0f the sans. furnace' eX:

tending' between the tubes theeof- A-lThiS bllrrr' 'is rectangular.ill/Cross" Sectn @11d *is hOHQW, th gibs, vlO-lllf'thereflorn through arow of gas jets'41eXtend'ing around the .margin Of the berne? @e the,upper 'Side thereof.' The ses Yburner is supported on lvlofwdel Platehav-ing ribs4 42 'formed' there- 011501,@ @teach end. theief 01,1. theunderside;

thesebs f fttngn seats, @est at GaCh. end 0f the lawyer plate; The,seats each consist of a Uf-,shaped lug 42 extending upwardly from theplate,A The burnerlugs or ribs 42 are 'inserted and rest between thearms of the respe@ive-lgusz of thev plate, f `VA gas pipev 44 enters' onfend of the gas burncrben'g screw threaded into thesaine.

,Ail @premiate ail: mxtlifemeeus 45 and fa door frame. 4T islinounted onthe.y side plate ofv the. gas furnace, this door :frame having upperandlower.y doors 48 and49respectively hinged thereto. .ThejlfowerAdoor-V49;is below the butwardiyextendingfgas line and. controls the` inletf` for`supplyingair to the combustionchamberand as burner. It will be undrstocd'fthatthi door. must be open tow permit combiistion vinthechamber. The

ppet doel" 48 is Off general utility and, in,-

@hides e Sight Opening 50S@- that the 00nditionof the gas flame. may be,)bserved.` Y

Toward. the; upper en d of the interior of the gas attachmentahorizontal baille plate 5l isv mounted-on .angle iron rack lugs 52.rlihe pipes or radiator' tubes. extendythrough openings in' this baffle'of: considerably greater. diameter for-'causing the products ofcombustion to move' upwardly adjacent the pipes for greater radiationandto'be' slightly rey i SOV.

furnace.

tarded sov as to be fullyeffective *inl heating the radiator area.,There is. also` a 4clearance between theedges of the baiiie 'and the-walls ofy the heaterv casing compelling' flow the walls for greater'radiafrom the gas furnace to the atmosphere'.l In 4this instance,conduits 53,53eXtend from the combustion chamber li'of the gas furnacetothe combustionchamberof the coal side of the. gas furnace to the frontplate' thereof as far up on the plate as possible .and above the baffle.l'The conduits 53, 53

extend from these fittings toward the front of the co-alfurnacean'dfelbowsA 57 thereof extend the conduits "inwardly toward the feedsnout."r The 'connection of these con-Y duits to the feed snout:v is Vofthe following construction. The openings to which, the conduits areconnected' mustvbe cut'in: the cast irony snout of the combustionchamberof the coal furnace. An opening 56 slightly larger than the size ofthepipe isscut into each side of the feed snout. `This cutting is donebymeansof a special tool provided for the installation of these gasheaters. It `will be apparent that these openings could be cast in thefurnace ifV desired butthe foregoing Vap lies to the conventional coal"furnacef *xteriorly screw threaded sleeves 58,68 are inserted lin theseopeningsr and the'inwardly disposedends of theelbows' are inserted inthese sleeves. i A pair ofl lock nuts 59, 59 on each sleeve'complete theattachment. nut on the inside and oneon theoutside firmly clamping :thesleeve to thewall of the feed snout. From this connection the productsofcombustion and fumes pass through the combustion chamber andradiato'rof'the coal furnace and then aredischarged intoFthe flue f ofthe chimney byway of the conventional smoke pipe. l l

Thefresh air intake GOjfor the furnace is toward the rear thereof justbelow the gas heater casing, there being a stub extending from the outercasing Vof the `combined furnaces to which a cold air co-nduitinay beattached, ifthe y'cellar air isn'ot desired. l From this intake' openingthe fresh .e air passesupwardlv through the tubes of and around thecasing of the gas heater, about the feed section and radiator ofthe'hotair furnace, `being heated by Contact' with allthese respective parts,and thence moves into the hot airpipes of the furnace to therespectiverooms. y.

A certain space between the `rear wall of the gas heater cabinet and theoutside casing of the combined. furnaces is convert-edginto a dead airspace byzth'e insertion of a baffle 6l in the form of astrip ofangleironalong-the A sleeve-55 is attached at each" In each connectionthere is a llock.

lower rear edge of the cabinet.' Ithas been found that, the rear wall ofthe gas? furnace A being adjacent the rear` wall casing ofthe furnaces,'someradiation' takes pl-ace' from the i `outer casing 26 thus lesseningtheeiiiciency of theyfurnace; By. deadening this space-it is possibletovprevent this lossfa'nd -to make use 'oflthis radiation at otherpoints.;E Y A For' the purpose 'of eliicientfiow'o'f-incoin-v Y ing aireither'to the gas heater or to the coal furnace, amovable baliie `plate62 ofthe followin'gnature isv 1vincludedfThisplate is hinged along yitsinner marginon afrod Y mounted'in-end rails tattached between ,1.

ther-legs ofthe gas heater. The hinge point for this baffle plate is"slightlybelow the un- `dersurface offthecabinetand the baffle is oflesserarea than the 'area' of the floorof the W'hen the'gaslheater is inuseand this'baifle -isnd'own /or positioned as Vshown in Figure l,

the incoming air is deflected into the tubes ofv the 'gas' furnace andcirculates through thev tu'beslto pass'in heated condition into the heatf Vdischarge pipes extendingto the rooms ofthe house. -Thebafiie causesthe majorpartof the incoming air to passlthrough theradiator tubes 'andthe remainder d to flow upwardly about thegas heater casing. -yItisdesirable- Y' to prevent'circulation of the incoming air around thecoldlower region offthefcoall furnace. After the air moves above' theAgas Y heater,-additional heating is accomplished Y throughy contactwiththe radiatorand com- 'bustion chamberof thecoal furnace.

`WVhen the fcoal furnace is being used, the f baffleisdrawn up tocauseits rear end toen#v gage' thelundersidef of the cabinet.` This isaccomplishedby means of-a chainfpattached l at one end'fto therear endofthebaflie andv having a'handle on its other end. This chain i T passesthrough a notclrin'thecasing 26.' This notchis Vshaped and tends tomaintain the chain in iixed'lpositionunless-the chain is raised anddisengaged therefrom. -Wlren-the baffle is in upper position the resultis to defiect the air into the region of the coal-fun Vnace and toblockthe entry of the-incoming coldair: through the tubes ofthe gasfurnace. j

discharge 'conduit 69 for the products of combustion respectivelyentering opposite sides of thefeed Vsnout of the coal'furnace';` VThedoor frames 70V at the'front ends ofthe'rel spectivel iunits protrudethrough and are mounted in fa sheet metal forward wall 71 of`the/furnace'.` This sheet metalwall has a depressedcentral portion towhich the main `door frame plate/T2 kof the Vcoal furnace is attached.

-, The combination of the gas heater with the conventionalI coal furnacehasV made an ,extremely e'ective .heating apparatus in fthe presentinstance. When the gasheater is beingl operated noty only, is avery'ljargefheat radiating area being used in they gas heater Vbut theextremely large heat, area of the. coal furnaceis additionallyutilized;V All the. ex-

.tra radiation resulting from the conduit conkao 'nection between thecombustion chamber of the respective heating devices 1s made use ofwithoutV additional cost in the operation-of thje apparatus for thereasonfthat the prod,-

ucts of combustion from the gas 'heater are Yordinarily directedimmediately tothe flue after they have passed through the gas heatl of'the gas heater to the heat discharge pipes of the furnace.

. Having described my invention, I claim:

1. In a gas heater unit, acasing constituting a combustion chamber,radiator tubes extending through said casing and providing passagewaysentirely therethrough, a gas burner disposed in the combustion chamberand extendingbetween the tubes, a baiiie. located across theinter-ior ofsaid combustion chamber above said burner, said baffle having clearanceopenings through which saidtubes extend for causingv a retardedflow ofthe products of combustion around'alltthe tubes andk means forexhaustingr the combustion chamberfabove' the baflie. I

2. ,A Vheating appliance, comprising, a casing constituting acombustion. chamber, means'for supporting said casing, a plurality ofradiator tubes extending between the topand bottom walls of said casing,the top and bottom wallsof the casing having openingsVthereinregisteringwith saidv tubes, a

baffle plate disposedin the upper interior of the casing transverselyVof said tubes, said baffle cut away tol provide clearance about saidtubesy and' about the walls of said cas'- adjustable baflie forVdirectingr the incomingA air l.either.tl'irough the air heatingpassageways of the'gasheater or into the regio'nof thecoal burningfurnace as desired.

f 4; In aheatingv apparatus, a coal burning y the base thereof, a gasheater casing having -an arcuate forward wall adapted to be disposedabout the coal furnace within said easing, a pluralityofradiator-tubes,extending verticallyl throu-ghsaid casing,-a gas burning elementdisposed between, said tubes,

and a plate disposed at the underside ofthe `gas heater-casing fordirecting or bafli'ing the air flow. lupwardly through the tubes.

5. A heatingapparatus, comprising, a coal eo furnaceya gas heater casinglocated at'the rear of said coal furnace'and having an arcuate forwardwall'encircling: the rear porti'on of the coal furnace, conduitsextending e from-'the upper end ofsaid gas heater' casing yand providingfree ftow of the heat from the Vgas heater to the coal furnace foradditional radiation from the radiatin-g'surfacesl of the coalfurnace,said conduits connected-to the y combustion cham-ber of thecoal furnace,a`

Vcasing surrounding-both the coal furnace and the gas heater casing,saidouter casing hava fresh air intake opening at therear of thefurnacebeneath thefgas heatery casi-ng,

said gas heater casing including air heating passageways, disposedupwardly therethrough,and means for selectively controlling the freshair either througlrthe air heating `passagewa-ys of the gas heatercasing or tothe coal furnace. Y

,6. A heating apparatus, comprising, a coal burning furnace, a.gasappliance mounted fat. the rear of said coal burning furnace, saidappliance having a'casing,includingy a for- A ward wallo-farcuate form`for encircling the rear of the coal furnace, a-,casing surrounding saidcoal furnace and gas appliance, and a. baffle plate extended between thelower rear edge of ther gas appli-ance casing a-nd the rear Y r vvall ofthe main cas-ing., of the-furnace for preventing the upward passage ofYair through the space between the lrear wal'lof the gas applianceYcasing and the rear wall ofthe main casing of` thefurnace therebypreventing loss of heat through the rear wall of the main casing..

7.v In a, heating apparatus,fa coal. burning furnace, a gas heatermounted.. adjacent said furnace V'and' including vertically ydisposedair passageways therethrough, a main casing surrounding said coalburning furnace and said gas heater and including a fresh air inletopening ltoward its base, andi support- Lilo leo

ing* means forsaid gas heater for positioning l the same at anelevationv above the fresh air intake, whereby the fresh air' may passup-` wardly through said gasl heater and to the coal burning furnace.

Sek A heating'apparatus, comprising, a coal burning. furnace,af gaslieater'disposed at each side of said coal burning furnace includingvertically disposed air passageways therethrough, a casing surroundingsaid coal burning furnace and said gas heaters including a fresh airinlet, and supporting means for said gas heaters, whereby the fresh airl may pass under the same and upwardly therethrough and to the coalburning `furnace. u

`In witness whereof, I hereunto subscribe my name.

ADOLPI-I E. MUNKEL.Y

